Borosilicate 3.3 Float glass (BG33)
Chinese domestic Borosilicate 3.3 float glass (BG33) is a special kind of borosilicate glass with excellent physical and chemical properties. Its main components include silicon oxide (SiO2), boron oxide (B2O3) and sodium oxide (Na2O), of which the content of silicon and boron is higher, respectively 78%-80% and 12.5%-13.5%1. BG33 is widely used in laboratory utensils, optical equipment, electronic components and other fields, and is valued for its excellent heat resistance, chemical resistance and mechanical strength.
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Low Thermal Expansion: Minimizes deformation with temperature changes, suitable for high temperatures.
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Excellent Thermal Stability: Usable up to 450°C long-term, withstands short bursts up to 500°C.
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Outstanding Chemical Resistance: Resists water, acids, alkalis, and organic substances.
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Strong Mechanical Properties: High bending strength (160 N/mm²) and good abrasion resistance.
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High Electrical Insulation: Excellent resistivity (≈ 8.6×1013 Ω⋅cm), ideal for electrical applications.
Product performance:
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- Good high temperature resistance,
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- stable chemical properties
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- Excellent transmittance
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- Available in a variety of thicknesses
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- for a variety of optical applications
Technical parameter:
| Factory size(mm): | 1150×850, 1200×600, 1150×1700 Other sizes can be produced on request |
| thick Degree(mm): | 1.2-20 |
| Density(g/cm3)(at25°C): | 2.23士0.02 |
| Coefficient of expansion (a)(20-300°C): | 3.3+0.1×10-6 |
| Softening point (°C): | 820士10 |
| Temperature difference performance of the same sheet (K) : | 100 >300(Enhanced) |
| Heat shock resistance(K) | 125 |
| Maximum operating temperature (°C): | 450 |
| Refractive index n.: | 1.47384 |
| Transmittance: | 92%(thickness <4mm)91%(thickness >5mm) |
| Follow-up processing: | Cutting, edging, drilling, coating, semi.toughening,screen printing, etc |
Field of use:
Borosilicate 3.3 is a truly versatile and widely used material
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- Household appliances (glass panel inside oven, microwave tray, stove panel, etc.)
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- Environmental Engineering,chemical Engineering (Resistant lining, chemical reactor, Safety mirror)
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- Lighting(protective glass for spotlights and high-power flood lightingfixtures
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- Solar power generation (solar cell substrate)
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- Precision instrument (optical filter)
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- Semiconductor technology (wafer, display glass)
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- Medical technology bioengineering
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- Safety protection (bullet-proof glass)
Borosilicate 3.3 Float glass (BG33) applications：
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